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Korean Journal of Preventive Medicine 1990;23(2): 185-193.
Change in Medical Care Utilization over Time in Early Years of Insurance Coverage.
Byoung Yik Kim, Youngjo Lee, Dal Sun Han
Institute of Health Services and Management Hallym University, Korea.
ABSTRACT
The purpose of this study is to observe the pattern of change in medical care utilization over time in early years of insurance coverage. The source of data is the benefit records file of a voluntary medical insurance society for covering the four-year period, from 1982 to 1985. The measure of medical care utilization used in this study is the age-sex standardized percentage of the enrollee who have visited a physician over total analytical population during a three-month period. For six cohorts by the year of enrollment (1979-1984), the relationship between the utilization and duration of insurance coverage was examined controlling for the calender year and season. In the analysis, logistic multiple regression and residual analysis were employed. It was observed that medical care utilization rapidly increased during the early stage of insurance coverage, and after then increased at a slower rate over time to become almost stable in about twenty months.
Key words: duration of insurance coverage; medical care utilization; logistic multiple regression; residual analysis
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